Spacing means for mold forms



. June 24,1930 F, G. CARLSQN 1,767,834

SPACING MEANS FOR MOLD FORMS Filed March 28, 1928 avwautoz Z6. Car/$022 GMQW Z-KW Patented June 24, 1930 FREDERICK G. GARLS O N, 0F BROOKLYN, NEW'YORK BEA OING MEAldS FOR MOLD FORMS Application filed MarcHflS, 1928'. Serial No. 265,282.

.This invention relates to spacing means for mold forms, and more particulargyto for devices of that character which are use tofore, wood spacer beams have been arranged between the spaced walls of the mold form to be removed as the pouring of the concrete between the form walls progresses.

Considerable difiiculty attends the removal of these spacers particularly where the form I is built up to a considerable height so that many of the spacer bars are not removed and become incorporated in the concrete structure after it has set or hardened. Disintegration of these wood spacer bars, results in the leakage of water through the wall structure.

In order to overcome this difiiculty, it has been proposed to provide spacingmeans for the mold form walls consisting of rods extending between the walls and threaded at their opposite ends for connection with coneshaped members bearing at their larger ends against .the inner faces of the mold walls. Additional threaded rods are then connected to the other ends of these cone-shaped members and extend outwardly through the mold walls and through suitable supporting beams therefor and to the ends of the latter rods and against said beams clamping devices are applied. After the concrete has set, the mold walls are removed, by releasing the clamping devices and disconnecting the latter rods'from the cone members, after which said cone members are rotated and disconnected. from the spacing rod which is incorporated in the concrete structure. The cavities in the faces of the wall resulting from the removal of the cone members are then filled in with concrete. While this device is more orless efficient, it is comparatively expensive, due to the necessity of providing the cast metal cone members with internal threads and also threading the ends my present invention to provi form spacing means of the above kind which of the"'several rods constituting each of the spacing devices. Also the assemblage of the p a several parts consumes considerable time and the purpose of spacing apart the opposite, side walls of a concrete mold form. Hereis somewhat diflicult. I It IS theaprimary}. object and (purpose-of e a mold however, may be verj; easily and quickly assembled and wherein the use of threaded connections betweenthe' individual parts .is entirely avoided.

- It is also another object of the invention to provide the three primary spacing elements arranged between themold forms, each of which is constructed of relatively light sheet metal and is of hollow or tubular form 'so that the tie rod which receives the form r clamps may be readily inserted through or removed from these assembled elements.

I With the above and other objects in view,

the invention consists in the improved spacing means for concrete mold forms and in the form, construction and relative arrangement of its several parts as will be hereinafter more fully described, illustrated in the accompanying drawings, and subsequently incorporated in the subjoined claims.

In the-drawing, wherein I have illustrated one simple and practical embodiment of the invention, and in which similar reference characters designate corresponding parts throughout the several views,--

Figure 1 is a fragmentary vertical section of a mold form illustrating one practical embodiment of the present improvements;

. Fig. 2 is a sectional view through a portion of the molded concrete wall after the mold form has been removed, and v Fig. 3 is a perspective view partly in section showing the essential parts of the device disassembled.

f Referring in detail to the drawing, 5 destogether by the vertically extending beams 6.

In conjunction with these two cne mem-.

bers, asingle straight section of sheet metal tubing 11 of the required length is employed,

said tubing being of such internal diameter that it may be readily fitted over the reduced extensions 10 of the members 7 to hearat its ends against the shoulders 9.

In applying the spacing means, the cone members 7 are arranged with their end :ianges 8 bearing against the inner faces of the mold walls around openings which have been'formed through said walls and the spacing tube 11 is then engaged at its opposite'ends over the reduced necks or extensions of said cone members.

Horizontal beams 12 are secured across the vertical beams 6, said beams 6 and 12' having openings to register with each other and with the openings in the mold wall 5.

The tie rod 13 is then inserted through said registering openings and through the two conemembers 7 and the spacing tube 11 as a clearly seenin Fig. 1 of the drawings.

- in tight abuttin Suitable formclamps 14 are then engaged upon the opposite ends of the rod 18 and against the beams 12 to hold the mold walls contact against the ends of the cone mem ers 7 against the outward expanding pressure of the concrete when poured between the walls of the mold.

and settles around the cone members 7 and the spaclng tubes 11 of the several spacing devices. It will however, be observed that the concrete does not come into contact with the tie rod 13 which is entirely covered by the parts 7 and 11' of the spacing means. After the concrete has set or hardened, the

' form clamps 14 are then removed and the tie rods 13 can be easily withdrawn through the spacing tubes 11 and the members 7. By means of a suitable tool inserted through the cone members 7 and engaged with the end of the reduced neck 10, the cone member can be pulled outwardly and easily disconnected from the end of the spacer tube 11 which remains in the wall structure as shown in Fig.2 of the drawings. The cav- 1t1es 1n the faces of the wall resulting from the removal of these cone members can then and the subsequent removal of said members can be much more easily and quickly efi'ectecland without liability of breaking up the' concrete surrounding the coneshaped members which is incident to a 1'0- tative'movement of these members. i

From the foregoing description considered in connection with the accompanying drawings,it will be seen that I have devised a very simple and etlicient spacing means for the walls of concrete molds whereby time, labor and expense incident to the erection of mold forms may be very appreciably reduced. At the same time, a very substantial and durable structure is provided which when properly assembled between the mold Walls, will rigidly support and retain said walls in the desired spaced relation to each other; I haveherein shown and described a particular form and construction of the several parts of the spacing means,- which I have found to be. very desirable in practical use. However, the coneshaped members 7 with which the spacer tube is connected might be of other detailv structure than that herein shown, and other alternative 'means might also be employed for retaining these members 7 in assembled relation with the opposite ends of the spacing tube. It is therefore, to be understood that invpractice, Ireserve the privilege of resorting to all such legitimate changes 1n the detail form and construction of the sev- The concrete 1s then poured into the mold A eral elements as may be fairly embodied within the spirit and scope of the invention as claimed.

- Ic'laim:

a pair of hollow sheet metal cones having flanges at t elr wlder ends engaging against jthe inner-sides of the wall and having shoal- "ders and extensions at their smaller ends, ,a sheet metal tube having its ends fitted over' the extensions of the two cones and abutting at its ends against the shoulders of the two coges and tube, and clamp means on the tie ro 2. A spacing device for walls, comprising a. pair of cones having flanges at theirwider ends adapted to engage against the inner sides of the wall and provided on their smaller end with shoulders and extensions,

1. A spacing device for walls comprising cones, a tie rod passing through the walls,

a tube arranged between the cones and adapted for interfitting engagement at its ends over said extensions of the cones and. adapted to abut at its opposite ends against said shoulders of the two cones, an unthreaded tie rod passing through the walls, cones and tubes, and clamp means carried upm the opposlte end portions of the tie ro I In testimony that I claim the foregoing .as my inventlon, I have signed my name hereto.

FREDERICK CARLSON. 

